a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...

abstract in the present research solution of chalcopyrite in sulfuric acid in hydrometallurgy method using electrochemistry with cyclic voltammetry technique has been investigated. the value of maximum reduction peak current of copper ions represents the measure of solubility. in this research different parameters temperature, potential, potential exert time, chalcopyrite concentration, sulfur...

Auditing is one of the subsystems that assesses the responsiveness for the consumption and utilization of public funds by examining and commenting on the accountability process. The subsystem consists of subsystems such as financial audit, compliance auditing, and performance auditing that help interact with other subsystems to perform and evaluate the process of accountability in a social orga...

Background and Aim: Considering the scope of tasks and the role of teaching hospitals in the promotion of population health, it is important to consider their responsiveness as one of the three goals of health system. The aim of this study was to evaluate the level and relative importance of responsiveness domains in teaching hospitals from the viewpoint of households living in selected areas o...

in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...